./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:16:29,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:16:29,845 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:16:29,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:16:29,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:16:29,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:16:29,886 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:16:29,887 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:16:29,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:16:29,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:16:29,890 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:16:29,891 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:16:29,891 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:16:29,892 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:16:29,893 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:16:29,894 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:16:29,895 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:16:29,896 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:16:29,897 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:16:29,897 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:16:29,898 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:16:29,899 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:16:29,900 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:16:29,901 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:16:29,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:16:29,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:16:29,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:16:29,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:16:29,904 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:16:29,905 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:16:29,905 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:16:29,906 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:16:29,907 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:16:29,907 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:16:29,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:29,909 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:16:29,909 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:16:29,910 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:16:29,911 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:16:29,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:16:29,912 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:16:29,913 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:16:29,913 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:16:29,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:16:29,914 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2023-11-23 21:16:30,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:16:30,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:16:30,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:16:30,258 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:16:30,259 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:16:30,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2023-11-23 21:16:33,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:16:34,190 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:16:34,191 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2023-11-23 21:16:34,238 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/data/1bcedcf6e/09b61c74a88f4f2ea1ccdd6caacc484e/FLAG6f0a8324f [2023-11-23 21:16:34,257 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/data/1bcedcf6e/09b61c74a88f4f2ea1ccdd6caacc484e [2023-11-23 21:16:34,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:16:34,271 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:16:34,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:34,276 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:16:34,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:16:34,286 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:34" (1/1) ... [2023-11-23 21:16:34,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e097049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:34, skipping insertion in model container [2023-11-23 21:16:34,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:16:34" (1/1) ... [2023-11-23 21:16:34,429 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:16:35,451 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2023-11-23 21:16:35,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:36,014 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:16:36,266 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5441] [2023-11-23 21:16:36,269 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [5448] [2023-11-23 21:16:36,270 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %2,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5456-5457] [2023-11-23 21:16:36,272 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [5485] [2023-11-23 21:16:36,273 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0": "+m" (v->counter)); [5492] [2023-11-23 21:16:36,295 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2023-11-23 21:16:36,354 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/work/ldvuser/mutilin/launch/work/current--X--drivers--X--defaultlinux-3.12-rc1.tar.xz--X--144_2a--X--cpachecker/linux-3.12-rc1.tar.xz/csd_deg_dscv/6225/dscv_tempdir/dscv/ri/144_2a/drivers/net/can/usb/ems_usb.o.c.prepared"), "i" (546), "i" (12UL)); [6159-6160] [2023-11-23 21:16:36,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:16:36,527 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:16:36,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36 WrapperNode [2023-11-23 21:16:36,528 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:16:36,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:36,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:16:36,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:16:36,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:36,615 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:36,819 INFO L138 Inliner]: procedures = 169, calls = 760, calls flagged for inlining = 78, calls inlined = 78, statements flattened = 2216 [2023-11-23 21:16:36,819 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:16:36,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:16:36,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:16:36,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:16:36,833 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:36,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:36,865 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:36,871 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:36,986 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:37,002 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:37,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:37,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:37,113 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:16:37,114 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:16:37,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:16:37,115 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:16:37,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (1/1) ... [2023-11-23 21:16:37,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:16:37,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:37,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:16:37,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_189023ed-d0d4-4b76-8cc6-d0cf9168e6c4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:16:37,208 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-11-23 21:16:37,209 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-11-23 21:16:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:16:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_18 [2023-11-23 21:16:37,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_18 [2023-11-23 21:16:37,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2023-11-23 21:16:37,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2023-11-23 21:16:37,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_3 [2023-11-23 21:16:37,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_3 [2023-11-23 21:16:37,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2023-11-23 21:16:37,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2023-11-23 21:16:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:16:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:16:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:16:37,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:16:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:16:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2023-11-23 21:16:37,213 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2023-11-23 21:16:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2023-11-23 21:16:37,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2023-11-23 21:16:37,215 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2023-11-23 21:16:37,215 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2023-11-23 21:16:37,216 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-23 21:16:37,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-23 21:16:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2023-11-23 21:16:37,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2023-11-23 21:16:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2023-11-23 21:16:37,217 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2023-11-23 21:16:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 21:16:37,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 21:16:37,219 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:16:37,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:16:37,219 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-23 21:16:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-23 21:16:37,220 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-23 21:16:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-23 21:16:37,220 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2023-11-23 21:16:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2023-11-23 21:16:37,221 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:16:37,221 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:16:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2023-11-23 21:16:37,222 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2023-11-23 21:16:37,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:16:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:16:37,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:16:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:16:37,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:16:37,223 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:16:37,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:16:37,224 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-23 21:16:37,224 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-23 21:16:37,224 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2023-11-23 21:16:37,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2023-11-23 21:16:37,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:16:37,225 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2023-11-23 21:16:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2023-11-23 21:16:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-23 21:16:37,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-23 21:16:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2023-11-23 21:16:37,228 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2023-11-23 21:16:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:16:37,229 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2023-11-23 21:16:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2023-11-23 21:16:37,229 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 21:16:37,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 21:16:37,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:16:37,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:16:37,230 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2023-11-23 21:16:37,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2023-11-23 21:16:37,230 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:16:37,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:16:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-23 21:16:37,231 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-23 21:16:37,231 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-23 21:16:37,231 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-23 21:16:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:16:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_disconnect [2023-11-23 21:16:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_disconnect [2023-11-23 21:16:37,232 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2023-11-23 21:16:37,232 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2023-11-23 21:16:37,233 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2023-11-23 21:16:37,233 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2023-11-23 21:16:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2023-11-23 21:16:37,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2023-11-23 21:16:37,234 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2023-11-23 21:16:37,234 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2023-11-23 21:16:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:16:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2023-11-23 21:16:37,235 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2023-11-23 21:16:37,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:16:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_rx_err [2023-11-23 21:16:37,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_rx_err [2023-11-23 21:16:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:16:37,236 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:16:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_warn [2023-11-23 21:16:37,237 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_warn [2023-11-23 21:16:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 21:16:37,237 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 21:16:37,237 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2023-11-23 21:16:37,237 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2023-11-23 21:16:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-23 21:16:37,238 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-23 21:16:37,238 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2023-11-23 21:16:37,239 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2023-11-23 21:16:37,239 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-23 21:16:37,239 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-23 21:16:37,240 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_info [2023-11-23 21:16:37,240 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_info [2023-11-23 21:16:37,240 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-23 21:16:37,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-23 21:16:37,241 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2023-11-23 21:16:37,241 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2023-11-23 21:16:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:16:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2023-11-23 21:16:37,242 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2023-11-23 21:16:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:16:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:16:37,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:16:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:16:37,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:16:37,794 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:16:37,797 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:16:38,057 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:16:39,097 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-23 21:16:41,945 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:16:42,978 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:16:42,984 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:16:42,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:42 BoogieIcfgContainer [2023-11-23 21:16:42,986 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:16:42,990 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:16:42,991 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:16:42,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:16:42,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:16:34" (1/3) ... [2023-11-23 21:16:42,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a200fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:42, skipping insertion in model container [2023-11-23 21:16:42,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:16:36" (2/3) ... [2023-11-23 21:16:42,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a200fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:16:42, skipping insertion in model container [2023-11-23 21:16:42,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:16:42" (3/3) ... [2023-11-23 21:16:43,001 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2023-11-23 21:16:43,023 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:16:43,023 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:16:43,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:16:43,121 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1c0a44f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:16:43,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:16:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 542 states, 333 states have (on average 1.3543543543543544) internal successors, (451), 357 states have internal predecessors, (451), 157 states have call successors, (157), 52 states have call predecessors, (157), 50 states have return successors, (151), 146 states have call predecessors, (151), 151 states have call successors, (151) [2023-11-23 21:16:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:16:43,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:43,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:43,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:43,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash 104424872, now seen corresponding path program 1 times [2023-11-23 21:16:43,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:43,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496222321] [2023-11-23 21:16:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:43,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:16:44,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:44,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496222321] [2023-11-23 21:16:44,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496222321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:44,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:44,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689182841] [2023-11-23 21:16:44,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:44,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:44,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:44,099 INFO L87 Difference]: Start difference. First operand has 542 states, 333 states have (on average 1.3543543543543544) internal successors, (451), 357 states have internal predecessors, (451), 157 states have call successors, (157), 52 states have call predecessors, (157), 50 states have return successors, (151), 146 states have call predecessors, (151), 151 states have call successors, (151) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:16:47,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:49,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:51,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:53,621 INFO L93 Difference]: Finished difference Result 1594 states and 2231 transitions. [2023-11-23 21:16:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:16:53,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-23 21:16:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:53,662 INFO L225 Difference]: With dead ends: 1594 [2023-11-23 21:16:53,663 INFO L226 Difference]: Without dead ends: 1037 [2023-11-23 21:16:53,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:53,679 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 715 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:53,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 1287 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2023-11-23 21:16:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2023-11-23 21:16:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2023-11-23 21:16:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 645 states have (on average 1.3255813953488371) internal successors, (855), 673 states have internal predecessors, (855), 293 states have call successors, (293), 99 states have call predecessors, (293), 98 states have return successors, (288), 278 states have call predecessors, (288), 288 states have call successors, (288) [2023-11-23 21:16:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1436 transitions. [2023-11-23 21:16:53,867 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1436 transitions. Word has length 23 [2023-11-23 21:16:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:53,868 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1436 transitions. [2023-11-23 21:16:53,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:16:53,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1436 transitions. [2023-11-23 21:16:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:16:53,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:53,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:53,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:16:53,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:53,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1210125165, now seen corresponding path program 1 times [2023-11-23 21:16:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366212057] [2023-11-23 21:16:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:16:54,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:54,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366212057] [2023-11-23 21:16:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366212057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:16:54,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:16:54,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:16:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518044382] [2023-11-23 21:16:54,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:16:54,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:16:54,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:16:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:16:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:16:54,584 INFO L87 Difference]: Start difference. First operand 1037 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:16:57,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:16:59,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:01,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:04,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:04,708 INFO L93 Difference]: Finished difference Result 1823 states and 2504 transitions. [2023-11-23 21:17:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:04,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-23 21:17:04,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:04,725 INFO L225 Difference]: With dead ends: 1823 [2023-11-23 21:17:04,725 INFO L226 Difference]: Without dead ends: 1820 [2023-11-23 21:17:04,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:04,728 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 530 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:04,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1242 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 3 Unknown, 0 Unchecked, 10.0s Time] [2023-11-23 21:17:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2023-11-23 21:17:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1808. [2023-11-23 21:17:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1134 states have (on average 1.3350970017636685) internal successors, (1514), 1188 states have internal predecessors, (1514), 489 states have call successors, (489), 187 states have call predecessors, (489), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-23 21:17:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2487 transitions. [2023-11-23 21:17:04,888 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2487 transitions. Word has length 32 [2023-11-23 21:17:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:04,888 INFO L495 AbstractCegarLoop]: Abstraction has 1808 states and 2487 transitions. [2023-11-23 21:17:04,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:17:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2487 transitions. [2023-11-23 21:17:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 21:17:04,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:04,891 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:04,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:17:04,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:04,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1141175100, now seen corresponding path program 1 times [2023-11-23 21:17:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:04,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073850670] [2023-11-23 21:17:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:17:05,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073850670] [2023-11-23 21:17:05,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073850670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:05,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:05,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:05,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169468226] [2023-11-23 21:17:05,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:05,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:05,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:05,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:05,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:05,360 INFO L87 Difference]: Start difference. First operand 1808 states and 2487 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:17:08,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:09,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:09,773 INFO L93 Difference]: Finished difference Result 1810 states and 2488 transitions. [2023-11-23 21:17:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-23 21:17:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:09,789 INFO L225 Difference]: With dead ends: 1810 [2023-11-23 21:17:09,790 INFO L226 Difference]: Without dead ends: 1807 [2023-11-23 21:17:09,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:09,792 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 715 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:09,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 626 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-11-23 21:17:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-11-23 21:17:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2023-11-23 21:17:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1134 states have (on average 1.3342151675485008) internal successors, (1513), 1187 states have internal predecessors, (1513), 488 states have call successors, (488), 187 states have call predecessors, (488), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-23 21:17:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2485 transitions. [2023-11-23 21:17:09,928 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2485 transitions. Word has length 33 [2023-11-23 21:17:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:09,929 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2485 transitions. [2023-11-23 21:17:09,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:17:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2485 transitions. [2023-11-23 21:17:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 21:17:09,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:09,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:17:09,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:09,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1017034416, now seen corresponding path program 1 times [2023-11-23 21:17:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:09,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264423901] [2023-11-23 21:17:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:09,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:17:10,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:10,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264423901] [2023-11-23 21:17:10,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264423901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:10,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:10,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:10,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214912685] [2023-11-23 21:17:10,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:10,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:10,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:10,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:10,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:10,158 INFO L87 Difference]: Start difference. First operand 1807 states and 2485 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:17:13,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:14,059 INFO L93 Difference]: Finished difference Result 1809 states and 2486 transitions. [2023-11-23 21:17:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-11-23 21:17:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:14,075 INFO L225 Difference]: With dead ends: 1809 [2023-11-23 21:17:14,075 INFO L226 Difference]: Without dead ends: 1806 [2023-11-23 21:17:14,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:14,081 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 712 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:14,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 624 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-11-23 21:17:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2023-11-23 21:17:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1806. [2023-11-23 21:17:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1134 states have (on average 1.3333333333333333) internal successors, (1512), 1186 states have internal predecessors, (1512), 487 states have call successors, (487), 187 states have call predecessors, (487), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-23 21:17:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2483 transitions. [2023-11-23 21:17:14,227 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2483 transitions. Word has length 34 [2023-11-23 21:17:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:14,227 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2483 transitions. [2023-11-23 21:17:14,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:17:14,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2483 transitions. [2023-11-23 21:17:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:17:14,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:14,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:14,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:17:14,231 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:14,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1463635641, now seen corresponding path program 1 times [2023-11-23 21:17:14,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:14,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425030091] [2023-11-23 21:17:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:14,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:17:14,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:14,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425030091] [2023-11-23 21:17:14,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425030091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:14,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:14,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321815143] [2023-11-23 21:17:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:14,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:14,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:14,435 INFO L87 Difference]: Start difference. First operand 1806 states and 2483 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:17:17,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:18,022 INFO L93 Difference]: Finished difference Result 1808 states and 2484 transitions. [2023-11-23 21:17:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:18,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-11-23 21:17:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:18,034 INFO L225 Difference]: With dead ends: 1808 [2023-11-23 21:17:18,035 INFO L226 Difference]: Without dead ends: 1805 [2023-11-23 21:17:18,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:18,039 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 709 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:18,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 622 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-11-23 21:17:18,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2023-11-23 21:17:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1805. [2023-11-23 21:17:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1134 states have (on average 1.3324514991181657) internal successors, (1511), 1185 states have internal predecessors, (1511), 486 states have call successors, (486), 187 states have call predecessors, (486), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-23 21:17:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 2481 transitions. [2023-11-23 21:17:18,184 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 2481 transitions. Word has length 35 [2023-11-23 21:17:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:18,185 INFO L495 AbstractCegarLoop]: Abstraction has 1805 states and 2481 transitions. [2023-11-23 21:17:18,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:17:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 2481 transitions. [2023-11-23 21:17:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:17:18,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:18,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:18,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:17:18,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:18,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1871600435, now seen corresponding path program 1 times [2023-11-23 21:17:18,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:18,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436892076] [2023-11-23 21:17:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:17:18,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:18,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436892076] [2023-11-23 21:17:18,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436892076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:18,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:18,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:18,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527551154] [2023-11-23 21:17:18,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:18,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:18,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:18,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:18,400 INFO L87 Difference]: Start difference. First operand 1805 states and 2481 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:17:21,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:23,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:17:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:23,104 INFO L93 Difference]: Finished difference Result 1807 states and 2482 transitions. [2023-11-23 21:17:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:23,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-11-23 21:17:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:23,119 INFO L225 Difference]: With dead ends: 1807 [2023-11-23 21:17:23,120 INFO L226 Difference]: Without dead ends: 1798 [2023-11-23 21:17:23,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:23,122 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 706 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:23,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 621 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-11-23 21:17:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2023-11-23 21:17:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1798. [2023-11-23 21:17:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1128 states have (on average 1.3306737588652482) internal successors, (1501), 1178 states have internal predecessors, (1501), 485 states have call successors, (485), 187 states have call predecessors, (485), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-23 21:17:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2470 transitions. [2023-11-23 21:17:23,279 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2470 transitions. Word has length 36 [2023-11-23 21:17:23,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:23,279 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2470 transitions. [2023-11-23 21:17:23,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:17:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2470 transitions. [2023-11-23 21:17:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 21:17:23,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:23,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:23,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:17:23,288 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:23,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash 883914338, now seen corresponding path program 1 times [2023-11-23 21:17:23,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:23,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238183436] [2023-11-23 21:17:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:23,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:17:23,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:23,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238183436] [2023-11-23 21:17:23,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238183436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:23,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:23,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:23,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573424] [2023-11-23 21:17:23,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:23,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:23,552 INFO L87 Difference]: Start difference. First operand 1798 states and 2470 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9)